CVE-2026-1484
📋 TL;DR
A buffer overflow vulnerability exists in GLib's Base64 encoding routine when processing extremely large input data due to integer type miscalculations. This can cause memory corruption, potentially leading to application crashes or unpredictable behavior. Applications using GLib to process untrusted or very large Base64 data are affected.
💻 Affected Systems
- GLib
- Applications using GLib for Base64 encoding/decoding
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution if combined with other vulnerabilities, or complete application compromise leading to data loss or system takeover.
Likely Case
Application crashes (denial of service) when processing maliciously crafted large Base64 inputs.
If Mitigated
No impact if applications don't process untrusted Base64 data or have input size limits.
🎯 Exploit Status
Exploitation requires sending specifically crafted large Base64 data to vulnerable applications.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific fixed version
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2026-1484
Restart Required: Yes
Instructions:
1. Check current GLib version
2. Apply vendor-provided patches
3. Restart affected applications
4. Verify fix is applied
🔧 Temporary Workarounds
Input Size Limitation
allLimit the size of Base64 input processed by applications
Implement input validation to reject Base64 data above reasonable size limits
Use Alternative Base64 Library
allReplace GLib Base64 functions with alternative implementations
Modify application code to use different Base64 libraries
🧯 If You Can't Patch
- Implement strict input validation to reject large Base64 inputs
- Isolate vulnerable applications in restricted network segments
🔍 How to Verify
Check if Vulnerable:
Check GLib version and compare against vendor advisory for vulnerable versionsCheck Version:
pkg-config --modversion glib-2.0 (Linux) or check application dependenciesVerify Fix Applied:
Verify GLib version matches or exceeds patched version from vendor advisory📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing Base64 data
- Memory access violation errors in logs
- Unexpected termination of GLib-using applications
Network Indicators:
- Large Base64 payloads being sent to applications
- Repeated crash/restart patterns in services
SIEM Query:
search 'application crash' AND 'GLib' OR 'Base64' in application logs